What is sewage? In which way can sewage be harmful to us?
Solution and Explanation
Sewage is the municipal waste matter that is carried away in sewers and drains. It includes both liquid and solid wastes rich in organic matter and microbes. Many of these microbes are pathogenic and can cause several water-borne diseases. Sewage water is a major cause of polluting drinking water. Hence it is essential that sewage water is properly collected treated and disposed.
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OR
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Concepts Used:
Microbes in Human Welfare
There are several valuable microorganisms that are beneficial to humans in various manners such as:
In Household Products
- Fermentation of milk to produce yogurt.
- Milk cuddling to compose curd, cheese, and paneer.
In Industrial Products
- Production of beverages such as wine, beer, whiskey, brandy, or rum.
- Production of antibiotics such as Penicillin and other chemical substances to kill or retard the expansion of disease-causing microbes.
Fermented Beverages
- A fermentor is used to produce microbes on a large scale for industrial purposes.
- The brewer’s yeast (Saccharomyces cerevisiae) is used to make ethanol. At this time, the yeast ferments malted cereals and fruit juices.
Antibiotics
- The term antibiotic means “against life”. These materials can kill or destroy the growth of other microbes.